Derick and Jill Duggar Dillard welcomed their baby boy Monday. TLC

The Duggar family just got a little bit bigger. “19 Kids and Counting” star Jill (Duggar) Dillard welcomed her first baby with husband Derick Dillard Monday, People magazine is reporting.

The baby, who is the fourth grandchild for “19 Kids and Counting” leads Jim Bob and Michelle Duggar, was born just before midnight on Monday, weighing in at 9 lbs., 10 ounces. “According to the Dillards, mom and baby are doing well,” reports the magazine.

What did the newlywed couple name their first-born? After months of calling their expected son “Baby Dilly,” the couple revealed Tuesday the boy is Israel David. And that isn’t all the TLC reality couple shared with fans! People also snagged the first official photo of the family of three.

In the picture, Jill, 23, is holding the newborn. Israel is wearing a white onesie embroidered with his name. Derick, 25, can be seen posing next to his wife and son sporting a big grin, and an Israeli military T-shirt.

Jill, who passed her second official due date of April 5, last updated fans on her pregnancy Friday. Following rumors she had already given birth and had named the baby Isaiah, Jill took to Instagram to clear up the speculation. “Maybe this spicy Mexican food will make the baby come,” she posted to Instagram, making sure to include the tag, "#nobabyyet."

While Israel has already made his grand debut, Jill and Derick will only just discover their child’s sex on Tuesday night’s episode of “19 Kids and Coutning.” The forthcoming installment, titled “Jill's Having A…,” will feature the couple’s party to reveal the news. The episode airs at 9 p.m. EDT on TLC. The network will air a special about Jill's delivery in May in honor of Mother's Day.